Method for operator guidance, control panel component, production of a control panel component and home appliance comprising a control panel component

ABSTRACT

A rotary knob for a control panel of a home appliance comprises a support collar, a fixed frontal plate forming a cover cap that is arranged at a front end of the support collar, a fixed sensor layer that is operable to detect touch inputs at the frontal plate, discrete indicator elements forming an indicator layer, which are operable to provide operator guidance, a rotatable ring that is rotatably mounted to the support collar, the rotatable ring being rotatable with respect to the fixed frontal plate, and circuitry arranged to detect rotary inputs via the rotatable ring, and touch inputs via the frontal plate.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a Continuation-In-Part of U.S. patent applicationSer. No. 14/193,094, filed Feb. 28, 2014, now U.S. Pat. No. 9,983,783,which claims priority from German patent application 10 2013 113 772.5,filed Dec. 10, 2013. The entire content of those applications is fullyincorporated by reference herewith.

BACKGROUND

The disclosure relates to a method for selective operator guidance foroperator inputs, in particular for operator inputs in a home appliance.In addition, the disclosure relates to a control panel component, inparticular for an operating control panel of a home appliance, and to amethod for producing a control panel component, in particular for anoperating control panel of a home appliance.

The approaches and configurations described and explained below may beused in particular in the field of home appliances. Home appliances mayinclude in particular so-called “white goods”, i.e., for example,conventional appliances for cooling, washing, cooking, baking etc.

Control panel arrangements or operating front plates in home appliancesmay generally comprise interfaces for user interaction. These mayinvolve, for example, displays, warning lights, rotary switches,pushbuttons, momentary-contact pushbuttons, touch-sensitive surfaces ordisplays and associated labels or symbols. Conventional input elementssuch as, for example, buttons or switches often result in a certaindegree of complexity in terms of the manufacture of operating frontplates and control panel arrangements. This complexity may be evengreater the more possibilities there are for user interaction, i.e. themore user inputs are possible. In addition, a significant increase inthe number of switches, buttons or the like can make operating the homeappliance more difficult.

Various approaches are known from the prior art for enabling a pluralityof operator inputs using only one “user interface”. In this connection,DE 10 2008 032 451 A1 discloses a cooking appliance and a method foroperating a cooking appliance, wherein the cooking appliance comprisesan input display which is arranged as a touchscreen and may graphicallydisplay various information. In particular, this includes representinginformation in the form of graphical visualizations and/or animations.However, such a configuration is associated with a high level ofcomplexity and is therefore essentially only suited for high-endappliances and for appliances for professional use.

In view of this it is an object to present a method for selectiveoperator guidance in a home appliance.

It is a further object to present a control panel component, inparticular an operating control panel for a home appliance, which issuitable for implementing the above operator guidance method.

It is a further object to present a corresponding method for producingsuch a control panel component, which may be implemented with littlecomplexity and nevertheless may allow an extended user interaction.

It is a further object to present a control panel component that issuitable for a large number of variants and configurations in order tobe able to limit the manufacturing complexity involved even in the caseof relatively small production batch sizes.

It is a further object to allow for operator guidance which facilitatesoperation and use of the home appliance.

It is a further object to present a front plate arrangement and a homeappliance comprising such a front plate arrangement that provides ahigh-quality integrated configuration.

It is yet a further object to present a front plate arrangement and ahome appliance comprising such a front plate arrangement that may beperceived by the operator as providing high visual quality.

SUMMARY

In respect of the operating method, these and other objects of thepresent disclosure are achieved by a method for selective operatorguidance for operator inputs, in particular for operator inputs in ahome appliance, comprising the following steps:

-   -   providing a control panel component comprising a sensor layer        hidden by a cover layer, in particular a sensor layer extending        in a flat manner, which is designed to detect operator inputs,        in particular operator gestures,    -   defining a present input mode, comprising:        -   allocating at least one defined field to be evaluated for            operator inputs, in particular operator gestures, on the            sensor layer depending on the desired input mode, and    -   detecting and evaluating operator inputs in the field to be        evaluated.

In respect of the control panel component, these and other objects ofthe present disclosure are achieved by a control panel component, inparticular for an operating control panel for a home appliance,comprising the following: a cover layer, a sensor layer, which covers arear side of the cover layer in a flat manner, at least sectionally, anindicator layer comprising at least one discrete indicator element,wherein the sensor layer is arranged in between the cover layer and theat least one discrete indicator element, wherein the sensor layer isdesigned to detect operator inputs, in particular operator gestures,wherein the sensor layer may be activated sectionally depending on adesired input mode, and wherein the at least one discrete indicatorelement is actuable for selective operator guidance.

In respect of the production method, these and other objects of thepresent disclosure are achieved by a method for producing a controlpanel component, in particular an operating control panel for a homeappliance, comprising the following steps:

-   -   providing a cover layer, in particular a cover layer consisting        of a plastic material,    -   providing a sectionally activatable sensor layer, in particular        a sensor layer extending in a flat manner, which is selected to        detect operator inputs, in particular operator gestures,    -   joining the cover layer and the sensor layer, and    -   allocating at least one field to be evaluated for operator        inputs on the sensor layer depending on a desired configuration        of the control panel component.

According to the present disclosure, the sensor layer may be arranged“invisibly” to a user behind the cover layer, wherein the sensor layerdefines a region, in particular an area, in which operator inputs maypotentially be detected. During production or during operation, asection of the sensor layer may now be selected and activated in atargeted manner in order to be able to detect and evaluate user inputsthere. In other words, the control panel component may comprise a basicconfiguration and be actuated in variant-specific fashion depending onthe desired configuration. It is thus conceivable, for example, to useonly one or more (areas) sections of the sensor layer in the selectedvariant actually for the detection and evaluation of the operatorinputs. In this way, a large number of variants in terms of the controlpanel component may be implemented with little complexity.

In addition, the actuation or allocation of the sensor layer or theselected sections of the sensor layer during operation may take placedepending on the presently desired input mode. In other words, thismeans that one and the same sensor layer or sections thereof may beselected for different inputs. In other words, for example, in the caseof a washing machine, a specific selected section of the sensor layermay be used both for selecting a wash program (first input mode) and forselecting a wash temperature (second input mode). This example is citedmerely by way of representation of a large number of conceivablecombinations and configurations, for illustrative purposes.

The sensor layer is arranged on that side of the cover layer of thecontrol panel component which is remote from the operator in theinstalled state. Accordingly, this does not result in any opticalimpairments when only one subsection of the sensor layer is actuallyused for detection and evaluation of operator inputs.

In accordance with various aspects of the present disclosure, thecontrol panel component may be provided with an indicator layer (or:indicator plane), which is arranged behind the sensor layer (when viewedfrom the cover layer). In other words, the indicator layer and thesensor layer are arranged one on top of the other, at least sectionally.The indicator layer may be formed from at least one discrete indicatorelement. Within the meaning of the present disclosure, the discreteindicator element may be, in particular, an optical indicator elementwhich is designed to represent a limited quantity of information. Adiscrete indicator element is in particular not a graphical indicatorwhich is designed to represent images generated from pixels. A discreteindicator element within the meaning of the present disclosure may be,for example, status symbols, warning indicators, warning LEDs, barindicators, segment indicators and similar “discrete” indicatorelements. Discrete indicator elements are generally much more favorablethan pixel-based graphical indicator elements. In addition, discreteindicator elements generally comprise an increased level of robustnessand suitability for fluctuating environmental conditions. In otherwords, a large quantity of information may also be represented without apixel-based display. The operator may be given the impression that he isinteracting directly with the indicator since he may perform inputsdirectly in the region of the activated or activatable discreteindicator elements.

In accordance with various aspects of the present disclosure, at leastone discrete indicator element or a plurality of discrete indicatorelements which define the indicator layer, may be arranged “behind” thesensor layer. The at least one discrete indicator element may be used inconnection with the facility for the allocation and activation ofsections of the sensor layer for selective operator guidance or operatorinstruction. By way of example, at least one discrete indicator elementmay be activated selectively in order to output an optical signal, whichindicates to the operator that he may perform inputs in the region ofthe activated indicator element, which inputs are detected by the(hidden) sensor layer.

In an exemplary embodiment, the control panel component, in particularits sensor layer, is designed to detect analog or quasi-analog inputs bythe user. In other words, in an exemplary embodiment the sensor layer isused not only to switch specific functions on or off (digitally).Instead, it is now possible to detect extended user inputs, inparticular user gestures, which enable the selection of a value within avalue range, for example. In this way, the operation of the homeappliance may be significantly simplified. For example, the operator mayselect a target temperature within a comparatively wide temperaturerange simply by “swiping” along the cover layer. However, the operatormay also, in a different operating mode, perform a program selection,for example, in the same region when this is indicated to him by acorresponding activated discrete indicator element.

Operator inputs may generally include an increase in proximity to thecover layer and/or touching of the cover layer. Operator inputs may alsobe performed in punctiform fashion (for example in the form of a clickor a double click). However, operator inputs may also include movementpaths, such as swiping movements, circular movements or the like.Operator inputs may in principle be performed using an aid, for examplea stylus, or by means of body parts, in particular fingers or thumbs.Operator inputs may also be combined in order to enable complexfunctions. These may be, for example, a zoom function, i.e., forexample, an enlargement or reduction function. The sensitivity of thesensor layer to specific user inputs may be influenced, for example, bymeans of such complex gestures. Other extended/complex inputs areconceivable. For example, the sensitivity to swipe gestures, for examplefor temperature selection or time selection, may be influenced by meansof a zoom gesture.

Within the meaning of the present disclosure, the term operator guidancemay include an instruction or direction for performing an input to theoperator, but in addition also feedback to the operator once an inputhas been made. An instruction may be provided, for example, when anactivated discrete indicator element indicates or highlights a specificregion of the (hidden) sensor layer which is at present activated fordetection of operator gestures. Feedback to the operator may include,for example, a specific optical output used as a response to a specificoperator input. This may include, for example, a change to a barindicator which is in the form of a discrete indicator element. Inaddition, the optical output may include, for example, a change in colorof a discrete indicator element. In this way, indicator elements with arelatively simple configuration per se may be used to represent complexinformation. A sufficiently detailed user interaction may take place;this may increase the value, as perceived by the operator.

In an exemplary embodiment, the cover layer of the control panelcomponent completely covers the sensor layer. The cover layer is inparticular a substantially closed cover layer which completely coversthe sensor layer. In an exemplary embodiment, the sensor layer isarranged on the rear side of the cover layer, i.e. on that side of thecover layer which is remote from the operator during normal operation.

The manufacturing method for producing the control panel componentenables a high degree of flexibility during production. Since, by meansof the sectionally activatable sensor layer, a large potentiallyactivatable sensor area may be provided, sections for user inputs ofthis sensor area may be selected in a targeted manner by suitablecontact being made or suitable actuation (in each case in accordancewith the presently desired configuration). The introduction of thesectionally activatable sensor layer is not associated with significantadditional complexity. Instead, cost advantages in terms of productionmay result since a large number of variants may be realized on the basisof one basic configuration. The variants may differ from one another interms of the variety of functions, for example. Irrespective of whetherthe home appliance to be produced has a small function range, an averagefunction range or even a large function range, the required operatorinputs may be detected and evaluated in a simple manner by theconfiguration and actuation of the activatable sensor layer.

By way of example, the control panel component may be provided with thesensor layer in the mentioned manner and may be printed on its sidefacing the operator or treated in another way in order to produceoperating symbols which may be perceived by the operator. On the basisof the presently selected layout for the printing or processing, alayout corresponding to this of the sensor layer for selectiveactivation may now be selected using software or control engineering. Inother words, for example, a control device may be configured anddesigned, for example, in such a way that operator inputs are detectedonly in those regions of the sensor layer which correspond to theoperator symbols produced on the cover layer. The correspondingassignment of the selected sections of the sensor layer may be realizedin a simple manner on a software basis or using circuitry. In otherwords, a freely scalable control panel may be produced. The controlpanel may be provided with its function allocation at the end of theproduction process.

In an exemplary embodiment, the method for producing the control panelcomponent may include the following steps:

-   -   providing at least one discrete indicator element,    -   joining the cover layer, the sensor layer and the at least one        discrete indicator element, wherein the sensor layer is arranged        in between the cover layer and the at least one discrete        indicator element, and    -   providing an interface for a control device for actuating the at        least one discrete indicator element and for evaluating operator        inputs detected at the sensor layer for selective operator        guidance.

The interface may be, for example, a contact with the sensor layer, viawhich the control device communicates with the sensor layer. Inaddition, the interface may include contact between the control deviceand the at least one discrete indicator element, with the result thatthe control device may activate or deactivate selectively the at leastone discrete indicator element.

In addition, the method may comprise the following step:

-   -   allocating at least one defined field to be evaluated for        operator inputs, in particular operator gestures, on the sensor        layer for defining a present input mode depending on the desired        input mode.

In an exemplary embodiment, alternatively or in addition, the method mayinclude the following steps:

-   -   processing the cover layer, in particular printing or coating,        for producing at least one optically and/or haptically        perceivable operating symbol for operator guidance, and    -   allocating at least one field to be evaluated for operator        inputs on the sensor layer depending on a size and/or        arrangement of the at least one optically and/or haptically        perceivable operating symbol for selective operator guidance.

In other words, the operator guidance may be performed by means ofselectively activatable elements, the at least one discrete indicatorelement, and by permanently provided elements, the at least oneoptically and/or haptically perceivable operating symbol. Both types ofelements may be combined with one another.

In an exemplary embodiment of the control panel component, the sensorlayer is designed as a capacitive sensor layer, wherein the sensor layeris in particular designed to detect touches on the cover layer and/orincreasing proximity to the cover layer in the region of the sensorlayer.

In other words, the sensor layer may be configured as aprojected-capacitive sensor layer, for example. The sensor layer may inparticular be configured as a film-based sensor layer. It goes withoutsaying that other functional principles for the sensor layer fordetecting touches and/or increasing proximity to the cover layer may beused. By way of example, the sensor layer may be configured as aninductive sensor layer, a resistive sensor layer, an optical sensorlayer and/or a combined sensor layer.

The sensor layer may comprise in particular two planes which areinsulated from one another and which are each provided with a conductivematerial. By way of example, a first plane may comprise a row structureand a second plane may comprise a column structure. Other configurationssuch as, for example, rhombuses or the like are conceivable. In anexemplary embodiment, the sensor layer is configured such thatmultidimensional operator gestures and/or a plurality of operator inputsmay be detected simultaneously. Multidimensional operator gestures mayinclude, for example, swiping movements. The capacity to simultaneouslydetect a plurality of operator inputs may be characterized as, forexample, multi-touch capability.

In an exemplary embodiment, the control panel component comprises aninterface for a control device, which is designed to actuate selectivelythe sensor layer and the at least one discrete indicator element inorder to define a plurality of input modes. The at least one discreteindicator element may be activated selectively in order to indicate toan operator that a specific type of input may be performed at a specificlocation on the sensor layer. The control device may activate andcorrespondingly evaluate a section of the sensor layer for inputs in atargeted manner via the interface.

In an exemplary embodiment of the control panel component, the controldevice is designed to define a present input mode, wherein the controldevice is designed further to allocate at least one field to beevaluated for operator inputs on the sensor layer taking intoconsideration at least one selected input mode. This may be associatedwith the activation of at least one discrete indicator element in orderto indicate to the operator where he may perform his inputs and whattype of input is required at present.

In other words, in some exemplary embodiments a system for detectingoperator inputs may be formed which comprises at least one control panelcomponent and at least one control device in accordance with one of theabovementioned aspects. Such a system may be formed firstly as adiscrete component. Secondly, it is conceivable for the control functionfor actuating the control panel component to be transferred to a(superordinate) control device of the home appliance. Accordingly, thesystem may be formed, during fitting, by joining the control panelcomponent to complete the home appliance.

In accordance with a further configuration of the control panelcomponent, the indicator layer comprises at least one indicator elementwhich is in the form of a discrete, selectively activatable symbol or adiscrete, selectively activatable segment indicator, in particular inthe form of a seven-segment indicator. A selectively activatable symbolmay be, for example, a light-emitting diode or a collection oflight-emitting diodes. The selectively activatable symbol may furthercomprise a symbol representation, for example a silhouette which may beilluminated by means of an LED or a similar light source or a pictogram.A selectively activatable segment indicator may comprise, for example, abar indicator, a circular segment indicator, a multi-segment indicatorfor representing alphanumeric information or the like. In some exemplaryembodiments, various indicator types may be combined with one another inorder to form the at least one indicator element. The at least oneindicator element may be matched in particular to an expected userinput. Thus, for example, a swipe function may be combined with a barsegment indicator and/or an alphanumeric segment indicator. By swipingalong the presently activated section of the sensor layer, the operatormay influence the directly indicated value, with the result that directfeedback to the operator is provided. The at least one indicator elementmay also visualize a limitation of the presently defined field.

In an exemplary embodiment, the cover layer and the sensor layer areconfigured so as to be transparent or translucent, at least sectionally.In other words, the cover layer and the sensor layer may be at leastsectionally optically transmissive and therefore the optical perceptionof the at least one discrete indicator element which may be covered bothby the sensor layer and by the cover layer may be improved. The coverlayer and the sensor layer may be configured to be at least partiallytransparent or translucent, with the result that, for example when adiscrete indicator element is not activated, this is not perceivable tothe operator. In this way, the operation of the home appliance may besimplified further since discrete indicator elements which are notpresently required may be made “invisible”.

In accordance with a further configuration of the control panelcomponent, the cover layer is surface-treated, in particular printed orcoated, at least sectionally, and wherein the cover layer comprises atleast one optically and/or haptically perceivable operating symbol foroperator guidance. By way of example, the cover layer may be printed.Alternatively or in addition, the cover layer may be provided withraised or depressed structural elements. In addition, it is conceivablefor the surface structure of the cover layer to be influenced in atargeted manner in order to clearly highlight the at least one operatingsymbol. The mentioned measures may be combined with one another.

In this way, the control panel component may be provided withpermanently visible elements, as an alternative or in addition to theselectively activatable discrete indicator elements, in order toidentify input possibilities for the operator. The at least oneoptically and/or haptically perceivable operating symbol may comprise,for example, a graphical representation and/or an alphanumericrepresentation. In particular, the use of pictograms is conceivable. Inthe case of the sensor layer, a corresponding field or a section inwhich user inputs which are linked to the operator symbol may bedetected may be assigned to the at least one operating symbol of thecover layer.

In an exemplary embodiment, a control panel component in accordance withone of the abovementioned aspects is used in a home appliance.

In an exemplary embodiment, the method for selective operator guidancemay include the following step:

-   -   activating at least one discrete indicator element of an        indicator layer which is arranged on that side of the sensor        layer which is remote from the cover layer for identifying the        field to be evaluated of the sensor layer

In an exemplary embodiment, the defined field to be evaluated is atleast adjacent to the activated discrete indicator element. In a furtherexemplary embodiment, the allocated field to be evaluated is in front ofthe activated discrete indicator element (for the operator). In thisway, the operator may be given the impression of being able to performdesired inputs, for example a selection of or a change to a value,directly with the indicator element.

In accordance with a further exemplary embodiment of the method foroperator guidance, the step of defining the present input mode furthercomprises the step of assigning the field to be evaluated for operatorinputs to an operating symbol, which may be perceived optically and/orhaptically on the cover layer. In this way, permanently perceivablesymbols may also be used for instruction and guidance of the operator.In an exemplary embodiment, permanently visible elements and selectivelyactivatable elements may be combined with one another in order tofurther increase operator convenience and to be able to reduce the riskof erroneous operations. In a further exemplary embodiment, the methodfor selective operator guidance further includes the step of outputtingfeedback to the operator, in particular visual feedback, by selectiveactivation of at least one discrete indicator element of the indicatorlayer. The activation of the at least one discrete indicator element mayalso include, for example, a change to the at least one discreteindicator element. This may include, by way of example, a change incolor. In addition, this may also include a change to a discrete barindicator or segment indicator.

In an exemplary embodiment, the discrete indicator element activated forthe purpose of feedback to the operator is, when viewed by the operator,in the presently allocated field or at least in the vicinity of thepresently allocated field, with the result that the impression of directfeedback is provided. This may further increase the perceived value ofthe home appliance and operating procedure.

In accordance with a further aspect of the present disclosure, there ispresented a rotary knob for a control panel of a home appliance,comprising a support collar, a fixed frontal plate forming a cover capthat is arranged at a front end of the support collar, a fixed sensorlayer that is operable to detect touch inputs at the frontal plate,discrete indicator elements forming an indicator layer, which areoperable to provide operator guidance, a rotatable ring that isrotatably mounted to the support collar, the rotatable ring beingrotatable with respect to the fixed frontal plate, and circuitryarranged to detect rotary inputs via the rotatable ring, and touchinputs via the frontal plate.

This aspect may be combined with any further aspect and embodiment asdescribed herein. This applies to structural features, but also tomanufacturing and operating aspects.

In accordance with the above aspect, the rotatable ring does not have toinclude circuitry, sensor grids, etc. In an exemplary embodiment, therotatable ring is an injection-molded plastic ring. The frontal plate isnot arranged to be rotated with the rotatable ring. Hence, the frontalplate is a fixed frontal plate that is not moved with respect to thecontrol panel and/or the support collar when the rotatable ring isrotated.

In certain embodiments, the support collar extends from a cover of thecontrol panel. Hence, the support collar may be integrally formed withthe cover of the control panel. In the alternative, the support collaris arranged as a separate part that is attached to the cover of thecontrol panel. The frontal plate may be attached to the support collarto define a bearing seat for the rotatable ring.

It is not necessary to provide touchscreens and/or further sophisticateddisplays at the frontal plate of the rotary knob. Hence, the rotary knobis easy to manufacture, easy to assemble, and easy to operate.

Since the frontal plate of the rotary knob is not arranged to be rotatedwith the rotatable ring, it is easy to provide there a touchpad featureand to provide there user feedback and user guidance via simple anddiscrete indicator elements, such as LEDs, segment indicators (e.g.seven-segment-indicators), illuminable symbols, etc.

As used herein, a discrete indicator element is neither a pixel-baseddisplay nor a single pixel out of a great number of pixels that formsuch a display. By way of example, a discrete indicator element may be asymbol that is illuminable by a respective light source, as LEDs, forinstance.

The sensor layer is arranged as a two-dimensional or even as athree-dimensional (when a two-dimensional sheet is deformed) sensornetwork, sensor mesh, and/or a sensor grid. By way of example, thesensor network may be formed on a foil which is thus flexible and whichmay be deformed to match a two-dimensional and/or a three-dimensionaltarget shape. For instance, the conductive grid may be formed byprinting or a similar technique.

The rotary knob and the control panel that incorporates the rotary knobmay be designed, manufactured, configured and/or operated in accordancewith several aspects and embodiments of the present disclosure.

In an exemplary embodiment of the rotary knob, the sensor layer is aflexibly configurable sensor layer having a sensor network that definesan area which is available for operator inputs, wherein the sensor layeris sectionally activatable depending on a desired input mode so as todefine at least one field corresponding to a sectionally activatablearea to be monitored for operator inputs on the sensor layer dependingon the desired input mode, and wherein the at least one defined field isa subset of the available area formed by the sensor network.

Hence, based on a single one or a small number of basic configurations,a huge number of variants may be defined by respectively operating andtailoring the basic configuration. One on the same sensor layer may beused to detect rotary input via the rotatable ring, and touch input viathe frontal plate.

In accordance with an exemplary embodiment of the rotary knob, thesensor layer also extends beneath and along the support collar and formsthere a rotary input detector field that is responsive to rotarymovements of the rotatable ring. In other words, the rotary knob mayinclude a rotary encoder feature.

In an exemplary embodiment of the rotary knob, the rotary input detectorfield is arranged to detect movements of an operator's fingers as therotatable ring is rotated. By way of example, the rotary input detectormay be arranged as a capacitive sensor, wherein the circuitry isarranged to detect changes in capacitance at the sensor layer which areindicative of movements/positions of the rotatable ring when the useroperates the rotary knob.

In a further exemplary embodiment of the rotary knob, the rotary inputdetector field is arranged to detect movements of the rotatable ring. Ina further exemplary embodiment of the rotary knob, the rotatable ringcomprises a position indicator element, the position of which isdetected by the rotary input detector field.

In a further exemplary embodiment of the rotary knob, the rotary inputdetector field forms a ribbon sensor that is operable to detect angularmovements. In other words, as in some embodiments only a single degreeof freedom (rotation) is provided for the rotatable ring, the associatedsensor field and/or circuitry may be simplified.

In a further exemplary embodiment of the rotary knob, the rotatable ringis rotatably retained between a peripheral edge of the frontal plate anda cover of the control panel from which the support collar extends.Hence, the frontal plate and support collar form a rotation bearing forthe rotatable ring.

In a further exemplary embodiment of the rotary knob, the sensor layeris a capacitive sensor layer having a capacitive sensor network. In thisway, touch inputs, touch gestures and similar inputs can be detected. Asused herein, the term touch input shall also involve user inputs in theproximity of the sensor layer and the rotary knob, respectively. Hence,the term touch input shall not be interpreted in a limiting sense.

In a further exemplary embodiment of the rotary knob, the sensor layerhas a three-dimensional shape manufactured through one of thermoformingand high pressure forming, based on a planar shape, wherein the sensorlayer is bonded with a support body through in-mold labeling.

In certain embodiments, the support body is a frontal component, forinstance at least one of the cover of the control panel and the frontalplate of the rotary knob. In certain embodiments, the support body is arear component, for instance a light guide that is associated with therotary knob.

Thermoforming is an established technique to deform originallyflat/planar foils/films. High pressure forming (HPF) is a relativelynovel technique, wherein the originally flat foil/film is fixed inside aforming tool and brought into the desired shape by a sudden applicationof heated compressed air at a pressure of 50 to 300 bars, wherein thetemperature is in the range of the softening temperature of the foilmaterial. In certain embodiments, also the desired labeling is applied(e.g. printed) prior to the deformation, and prepared and maintained insuch a way that even in the three-dimensionally deformed state, thelabeling is accurately shaped and positioned. This applies in particularto high pressure forming. The labeling may be on a separate foil/film,of may be printed onto a carrier substrate. Further, in certainembodiments, the labeling may be provided also on the film that formsthe sensor layer.

In-mold labeling (IML) may be used to integrate also a decorating layer(labeling) to form symbols, labels, etc. at the rotary knob and, moregenerally, at the control panel.

In a further exemplary embodiment of the rotary knob, the sensor layeris a basically planar sensor foil, wherein the sensor layer is bondedwith a support body through laminating. Also in this way, amulti-functional composite part may be formed, involving the sensorlayer, and, at least in some cases, also a labeling. Laminating may beused to bond two, three or even more layers.

In certain embodiments, the support body is a frontal component, forinstance at least one of the cover of the control panel and the frontalplate of the rotary knob. In certain embodiments, the support body is arear component, for instance a light guide that is associated with therotary knob. In a further exemplary embodiment, the rotary knob furthercomprises an indexing mechanism for the rotatable ring. Hence, userfeedback (e.g. a clicking noise) may be provided also in this way. Inaccordance with an exemplary embodiment, at least one indexing tooth isformed at the rotary knob, for instance at the rotatable ring and/or ata neighboring component. The at least one indexing tooth may cooperatewith respective counterparts, for instance with counterpart indexingteeth and/or an indexing spring, such as a leaf spring. Overall, theindexing mechanism may resemble a rattling and/or ratchet mechanism. Theindexing mechanism may on the one hand provide haptic user feedback. Onthe other hand, the indexing mechanism may provide defined angularoffsets and/or angular positions of the rotatable ring with respect tothe support collar and/or the frontal plate.

In a further exemplary embodiment of the rotary knob, at least one ofthe discrete indicator elements is arranged to illuminate a selectivelyactivatable symbol or a discrete selectively activatable segmentindicator. Hence, at the frontal plate, visual user feedback may beprovided. Preferably, the user feedback/user guidance is provided inreaction to and/or in preparation of user inputs at the frontal plate(touch input) and/or at the rotatable ring (rotary input).

In a further exemplary embodiment of the rotary knob, a seven-segmentindicator is formed at the frontal plate that is operable by selectivelyactivating the discrete indicator elements. Consequently, it is possibleto provide numerical data and/or alphanumerical information, despite ofthe absence of a pixel-based display.

By way of example, in a value/range selection mode, the user may selecta desired value or range by rotating the rotatable ring, which ispromptly indicated by the discrete indicator elements that form theseven-segment indicator and/or a similar indicator.

In a further exemplary embodiment of the rotary knob, the cover cap(frontal plate) and the sensor layer are at least sectionallytransparent or translucent. Hence, defined portions of the cover cap maybe illuminated.

In a further exemplary embodiment of the rotary knob, the sensor layeroverlaps at least some indicator elements of the discrete indicatorelements, wherein the circuitry is arranged to detect touch inputs inthe vicinity of said indicator elements. Hence, one and the same(frontal) region of the rotary knob may be used both for detecting userinputs and for providing feedback. By way of example, the user mayactivate certain functions by simply tapping respective fields at thefrontal plate, which is instantly confirmed by activating a respectiveindicator element at or in the vicinity of the field where the input hasbeen detected.

In a further exemplary embodiment of the rotary knob, the sensor layeris arranged between the cover cap and the indicator layer. Hence, thecover protects the relatively fragile sensor layer. The indicator layerforms a rear end of the arrangement. Hence, it is easy to arrange theindicator elements at a carrier substrate, for instance at a foilcarrier or a printed circuit board.

In a further exemplary embodiment of the rotary knob, the indicatorelements are arranged at a support substrate, wherein a light guide isarranged between the support substrate and the sensor layer. The lightguide may form a bridge between the support substrate in the rear andthe sensor layer/cover cap at the front. Hence, the freedom of design isincreased. The support substrate for the indicator elements may bebasically planar and/or otherwise have a relatively simple form. Thesupport substrate may also form a support for the operating circuitry ofthe rotary knob.

In a further exemplary embodiment of the rotary knob, the supportsubstrate is arranged at a rear side of a cover of the control panel,and wherein the light guide extends from the support substrate into thesupport collar to the frontal plate. Hence, as the rotary knob isprotruding from the cover of the control panel, there is a certainoffset between the support substrate and the frontal plate of the rotaryknob. It is thus possible to provide a light guide therebetween.

In accordance with a further aspect of the present disclosure, there ispresented a control panel for a home appliance, the control panelcomprising a rotary knob in accordance with at least one embodiment asdescribed herein. Hence, the rotary knob may be used as the main/primarycontrol element of the home appliance.

In an exemplary embodiment of the control panel, the rotary knob isformed at a frontal cover of the control panel, wherein further discreteindicator elements are arranged at the frontal cover in the vicinity ofthe rotary knob, wherein the circuitry is arranged to operate indicatorelements at the control panel in response to user inputs detected at therotary knob. Hence, the rotary knob may be used to provide controlcommands that are confirmed by activating/deactivating indicatorelements on the level of the frontal cover of the control panel, and notnecessarily on the level of the frontal plate of the rotary knob itself.It is to be noted that of course user inputs may be detected also on thelevel of the frontal cover of the control panel which involves that alsothere a sensor layer for detecting touch inputs and gestures may beprovided.

Generally, the control panel may be arranged in accordance with at leastone embodiment as described herein. The rotary knob may be used toaugment the control panel's function.

In accordance with a further aspect of the present disclosure, there ispresented a home appliance comprising a control panel having a rotaryknob in accordance with at least one embodiment as described herein.

It is to be understood that the previously mentioned features and thefeatures mentioned in the following may not only be used in a certaincombination, but also in other combinations or as isolated featureswithout leaving the spirit and scope of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features and exemplary embodiments are disclosed in thedescription below with reference to the drawings, in which:

FIG. 1 shows a perspective view of a home appliance comprising anoperating front plate;

FIG. 2 shows a simplified, perspective exploded illustration of a frontplate component for an operating front plate of a home appliance;

FIG. 3 shows a very simplified schematic illustration of a lateralsection through a configuration of a front plate component;

FIG. 4 shows a very simplified schematic lateral section through afurther configuration of a front plate component;

FIG. 5 shows a schematically very simplified plan view of a sensor layerfor visualizing possible user inputs or user gestures;

FIG. 6 shows a further schematically very simplified plan view of asensor layer with allocated fields in which user inputs are to bedetected;

FIG. 7 shows a schematically very simplified front view of aconfiguration of a front plate component with visual elements foroperator guidance;

FIG. 8 shows a further simplified front view of an alternativeconfiguration of a front plate component with visual elements foroperator guidance;

FIG. 9 shows yet a further simplified front view of a furtheralternative configuration of a front plate component with visualelements for operator guidance;

FIG. 10 shows a further simplified front view of yet anotherconfiguration of a front plate component with visual elements foroperator guidance;

FIG. 11 shows a schematic block diagram of an exemplary embodiment of amethod for operator guidance for operator inputs, in particular in ahome appliance;

FIG. 12 shows a schematic block diagram of an exemplary embodiment of amethod for producing a front plate component, in particular for anoperating front plate of a home appliance;

FIG. 13 shows a perspective view of an exemplary embodiment of a controlpanel for a home appliance, which is equipped with a rotary knob;

FIG. 14 shows a detail view of the arrangement of FIG. 13;

FIG. 15 shows an exploded view of the arrangement of FIG. 13;

FIG. 16 shows a frontal view of the arrangement of FIG. 13;

FIG. 17 shows a cross-sectional view of the arrangement of FIG. 16 alongthe line XVII-XVII in FIG. 16; and

FIG. 18 shows an exploded view of the arrangement of FIG. 17.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 shows a perspective view of a home appliance 10, which comprisesa front plate arrangement or operating control panel 12. The homeappliance 10 may be, for example, a dishwasher or the like. Homeappliances 10 may be configured, by way of example, as washing machines,refrigerators, freezers, ovens, hobs, microwaves, tumble dryers or thelike. Home appliances which combine various functions, such asrefrigerator/freezer combinations, for example, are also conceivable.

By way of example, the operating front plate 12 comprises at least onecontrol panel component 14. The at least one control panel component 14may comprise regions in which elements for operation or for userinteraction are arranged. It goes without saying that the operatingfront plate 12 may in particular be substantially integral. The controlpanel component(s) 14 may be integral parts of the operating front plate12. However, it is also conceivable for a plurality of control panelcomponents 14 to be embodied as individual parts and to be joined toform the operating front plate 12.

FIG. 2 shows a very simplified schematic perspective explodedillustration of an exemplary configuration of a control panel component14. An arrow denoted by 16 in this case identifies a typical viewingdirection of an operator who may perform operating inputs at the controlpanel component 14. On its side facing the operator, the control panelcomponent 14 comprises a cover layer 20, which may in particular beconfigured as a plastic component. A sensor layer 22 is arranged“behind” or “underneath” the cover layer 20, from the point of view ofthe operator. The sensor layer 22 may be in the form of, for example, asensor layer 22 for detecting touches or increasing proximity. It goeswithout saying that the sensor layer 22 in the exemplary embodimentillustrated using FIG. 2 may be designed to detect touches or increasingproximity on the plane of the cover layer 20, which may cover, inparticular completely cover, the sensor layer 22. The sensor layer 22may in particular be configured as an at least sectionallytouch-sensitive conductive film.

A so-called indicator layer 24 may adjoin the sensor layer 22 at therear, i.e. on that side of the control panel component 14 which isremote from the operator during normal operation. This indicator layermay be configured, for example, to visually highlight specific regionsof the sensor layer 22 for the operator for the purposes of operatorguidance and interaction. In accordance with various exemplaryconfigurations, the cover layer 20 may be provided at least partiallywith transparent or translucent regions 26. Similarly to this, thesensor layer 22 may also be configured so as to be translucent ortransparent, at least sectionally.

This sensor layer 22 may comprise a sensor network 28 and be configuredas a film component, for example, which comprises various conductiveregions. The sensor layer 22 may be configured as a transparent film,but alternatively also as a substantially opaque film. It goes withoutsaying that the sensor layer 22 may comprise a layer structure, forexample various conductive layers which are insulated from one another.The sensor layer 22 may generally define a region in which operatorinputs (touches or increasing proximity) in the region of the coverlayer 20 may be detected and evaluated.

The indicator layer (also: indicator plane) 24 may comprise at least onediscrete indicator element 30. By way of example, the indicator layer 24illustrated using FIG. 2 comprises a first discrete indicator element 30a and a second discrete indicator element 30 b. The indicator layer 24does not need to be provided as a physical part. Instead, the indicatorlayer 24 may be interpreted, at least in some configurations, as a(logical) combination of various discrete indicator elements 30. It goeswithout saying, however, that, in alternative configurations, theindicator layer 24 may act as a carrier structure for the at least onediscrete indicator element 30, by way of example.

The at least one discrete indicator element 30 may be configured, by wayof example, as a pictogram, a symbol, (predefined) alphanumericindicator, a segment indicator, a segmented bar indicator or the like.The at least one discrete indicator element 30 should in particular notbe understood as being limited to a pixel-based graphical indicatorelement. Instead, in some exemplary embodiments the at least onediscrete indicator element is predefined and designed in such a way thatprecisely one item of graphical information or a specific number ofdifferent items of graphical information are represented. The at leastone discrete indicator element may be illuminated in particular in orderto ensure sufficient visual highlighting for the operator.Light-emitting diodes, (discrete) LCD elements or the like are suitablefor this, for example. A limited variation of the information which maybe represented by the at least one discrete indicator element 30 may beperformed, for example, by color highlighting. In addition, inparticular in the case of segment-like discrete indicator elements 30, avariation of the information which may be represented may be performedby actuation of various segments/sub-elements. Accordingly, alphanumericinformation items, in any case to a limited extent, may also berepresented by means of segment indicators, wherein the number of digitsor letters which may be indicated is predefined and limited.

Control panel components 14 in accordance with various configurations ofthe present disclosure make use of the fact that the sensor layer 22 maybe applied to the cover layer 20 over a large area at reasonable cost.Joining the cover layer 20 to the sensor layer 22 may comprise, forexample, adhesive bonding, encapsulation by injection molding, in-moldmolding, embedding, force-fitting and/or form-fitting mounting andfurther conventional joining methods. In this way, the control panelcomponent 14 may be manufactured with a basic configuration, for examplecomprising the cover layer 20 and the sensor layer 22, with a reasonablelevel of complexity with mass production. The control panel component 14is particularly suited for selective prefabrication. For example, thismay include the allocation of sections of fields of the sensor layer 22for detection of specific operator inputs. In other words, a predefinedbasic configuration by means of targeted actuation of the sensor layermay be used with little complexity for a large number of variations inrespect of the ranges of operations allowed and offered.

Exemplary configurations in respect of the layer structure of thecontrol panel components 14 are illustrated in FIGS. 3 and 4, which eachshow very simplified schematic sections through control panel components14. FIG. 3 shows a control panel component 14, which may substantiallycorrespond to the control panel component 14 illustrated in FIG. 2, forexample. The control panel component 14 shown in FIG. 3 comprises acover layer 20, a sensor layer 22 and an indicator layer 24. Theindicator layer 24 is provided with various discrete indicator elements30 a, 30 b, 30 c. The control panel component 14 may be coupled to acontrol device 42, which may communicate with the sensor layer 22 andthe indicator layer 24 via an interface 36 and corresponding connectinglines 38, 40. The control device 42 is connected to the sensor layer 22via the connecting line 38. The control device 42 may detect informationitems which describe, for example, touches or increasing proximity to anouter face 34 of the cover layer 20 via the connecting line 38. Operatorinputs may be performed by means of an actuator 32, 32 a. The actuator32, 23 a may be, in particular, a body part of the operator, for examplea finger. However, it is also conceivable for a stylus or the like to beused. The sensor layer 22 and the control device 42 may be configured todetect touches of the cover layer 20, cf. the finger 32. Alternativelyor in addition, the sensor layer 22 and the control device 42 may alsobe configured to detect increasing proximity, i.e. no direct touchingcontact, to the cover layer 20, cf. the finger 32 a.

In addition, the control device 42 may be coupled to the discreteindicator elements 30 a, 30 b, 30 c via the connecting line 40. Thediscrete indicator elements 30 a, 30 b, 30 c may be actuated oractivated selectively in order to instruct the operator or guide theoperator during a desired operator input. In particular, the discreteindicator elements 30 a, 30 b, 30 c may be used for visuallyhighlighting a presently allocated and provided subsection or field ofthe sensor layer 22. In this way, the sensor layer 22 may be used for alarge number of different inputs and is configurable flexibly in thisregard.

It goes without saying that the discrete indicator elements 30 a, 30 b,30 c in various alternative configurations may also at least partiallyoverlap one another. In this way, one and the same region of the coverlayer 20 may be used for different inputs, depending on theconfiguration of the sensor layer 22. By way of example, one and thesame region may, in the case of a washing machine, be used for selectinga program mode, for preselecting temperature and for time control andfor the required user inputs or operator inputs associated therewith. Itgoes without saying that the section actually used in each case or therespectively selected field of the sensor layer 22 does not need to beidentical or congruent. Instead, by means of logic actuation of thesensor layer 22, a large number of sections or fields may be defined andmay be used for detecting and evaluating operator inputs. The definitionand allocation of the fields may take place, for example, on a softwarebasis and/or using circuitry.

FIG. 4 shows an alternative configuration of a control panel component14 a. The control panel component 14 a comprises a cover layer 20 and asensor layer 22, which is arranged or applied on that side of the coverlayer 20 which is remote from the operator. The sensor layer 22 isconfigured for detecting touches or increasing proximity. For actuationor evaluation of inputs detected at the sensor layer 22, the controlpanel component 14 a may be coupled to a control device 42, which may beconnected to the sensor layer 22 via an interface 36 by means of aconnecting line 38. The cover layer 20 may furthermore be provided withat least one operating symbol 46. By way of example, the control panelcomponent 14 illustrated using FIG. 4 comprises a raised operatingsymbol 46 a and a depressed operating symbol 46 b on its cover layer 20.In general, the operating symbols 46 may be provided so as to beoptically and/or haptically perceivable in the cover layer 20.

Printing methods, surface treatment and/or surface coating methods,material removal methods or the like are suitable, for example, forproducing the operating symbols 46. The operating symbols 46 may beintroduced into the cover layer 20 during shaping thereof, for exampleduring injection molding. The operating symbols 46 may in principlecomprise color highlighting. As has previously been illustrated, thesensor layer 22 may define a potentially possible region in which userinputs may be detected. The sensor layer 22 may now be actuated in sucha way that certain sections or fields, i.e. subsets of the sensor layer22, may be used and evaluated in a targeted manner for specific userinputs. The respectively defined fields may be in particular adjacent orassigned to the respective operating symbol 46 a, 46 b.

In accordance with a further exemplary embodiment, for example, a“semi-finished product” of the control panel component 14 a may bemanufactured which comprises a basic configuration. Such a“semi-finished product” may then be used for forming variants by virtueof various operating symbols 46 being highlighted in a targeted mannerthereon. This may be performed, for example, by means of printing. Apresently selected configuration of the operating symbols 46 a, 46 b maybe linked with an associated logic actuation of the sensor layer 22. Onthe basis of only a basic configuration, a large number of variants maybe realized; this may be performed without any substantial additionalcomplexity in terms of the hardware for the detection and evaluation ofthe operator inputs.

FIG. 5 illustrates a schematic plan view of an exemplary sensor layer22. The sensor layer 22 comprises a sensor network 28, which may have,for example, a structure comprising columns and rows. In this case, forexample, an arrow denoted by 48 may illustrate a first direction and anarrow denoted by 50 may illustrate a second direction. The arrows 48, 50may represent, by way of example, an X direction and a Y direction. Thesensor layer 22 is designed to detect operator inputs in terms oflocation (i.e. in relation to the first direction 48 and the seconddirection 50). This may take place, for example, in the case of acapacitive sensor layer 22, by influencing of a capacitance on the basisof a touching contact or an increasing proximity which is detected andevaluated.

By way of example, FIG. 5 also illustrates various conceivable operatorinputs or operator gestures which may be detected and evaluated. 52 aillustrates a single touch (tap or click). 52 b illustrates a doubletouch in temporal succession (a so-called double click). 52 cillustrates a gesture in the form of a sliding movement (so-calledswiping), cf. also the associated movement direction which isillustrated by an arrow denoted by 54. In addition, 52 d illustrates acomplex gesture which may be performed, for example, using two fingers(or finger and thumb). This may include, for example, a substantiallysimultaneous touch with two fingers and, after this, a movement of thefingers away from one another, cf. the associated directionalindications which are illustrated by the arrows denoted by 56 a, 56 b.Such a gesture may be used, for example, for scaling or “zooming”. In anexemplary embodiment the sensor layer 22 is designed for simultaneousdetection of a plurality of touches or increasing proximity. Such afunction may be referred to as multi-touch functionality.

FIG. 6 illustrates a logical subdivision of a sensor layer 22. Asalready illustrated above, the sensor layer 22 may define a region whichmay potentially be used for detecting user inputs. Within thispotentially possible region, for example, fields 60 a, 60 b may now bedefined which may represent the subsets of the sensor layer 22. Theallocation and definition of the fields 60 a, 60 b may take placeflexibly and may be associated with little complexity (in terms ofsoftware or circuitry). One and the same region of the sensor layer 22may be used (temporally spaced apart) for different fields 60, which mayat least partially overlap one another. For detection in terms ofposition of operator inputs which are performed in field 60 a, inparticular regions denoted by 62 a, 64 a of the sensor layer 22 need tobe evaluated. In order to detect operator inputs which are performed inthe field 60 b, in particular monitoring of a region of the sensor layer22 which is denoted by 62 b, 64 b is of interest. The regions 60 a, 60 bare flexibly selectable and may be stored in the control device 42 (cf.FIG. 3 and FIG. 4), for example, using software or circuitry duringmanufacture.

Various further exemplary configurations of control panel componentswhich comprise various discrete indicator elements and/or operatingsymbols for operator guidance are illustrated using FIGS. 7, 8, 9 and10.

The control panel component 14 b shown in FIG. 7 comprises informationobjects 68 a, 68 b which, in principle, may be formed by one of theindicator elements 30 of the indicator layer 24 or by one of theoperating symbols 46 of the cover layer 20. In addition, the controlpanel component 14 b comprises discrete indicator elements in the formof pictograms 70 a, 70 b. The pictograms 70 a, 70 b may be, by way ofexample, light indicators or illuminated symbols. In the presentconfiguration, fields 60 a, 60 b of the sensor layer 22 (cf. FIG. 6) maybe defined or selected in such a way that a first field 60 a extends ina region in which the pictogram 70 a is arranged. In addition, a field60 b may extend in a region in which the pictogram 70 b is arranged. Theoperator may now perform his inputs directly via the pictograms 70 a, 70b, which may furthermore indicate to him also the desired nature of theinput.

By way of example, the operator may perform a swiping movement orsliding movement in the field 60 a, which swiping movement or slidingmovement is oriented on the pictogram 70 a which represents a doublearrow. In this way, the operator may select a temperature, for example.The pictogram 70 b illustrates a circular arrow. In this way, it ispossible to indicate to the operator that he may select a program, forexample, by means of a swiping movement along a circular path. Theexemplary embodiment illustrated using FIG. 7 may be coupled to afurther indicator (not illustrated) in order to provide feedback to theoperator in respect of his input.

FIG. 8 illustrates a further exemplary configuration of a control panelcomponent 14 c. The control panel component 14 c is provided, by way ofexample, with information objects 68 a, 68 b, which may be configured,for example, as printed or similarly configured operating symbols. Inaddition, the control panel component 14 c comprises indicator elementsin the form of segment indicators 72 a, 72 b, which are (logically)linked to defined fields 60 a, 60 b of the sensor layer 22 (cf. FIG. 6).Each of the segment indicators 72 a, 72 b may be formed from a pluralityof selectively activatable segments 74 a, 74 b. The segment indicators72 a, 72 b and the fields 60 a, 60 b associated therewith may be linkedto one another in such a way that a user may perform an input directlyon the respective indicator. In other words, the operator may activate,for example, one of the segments 74 a, 74 b by means of a correspondingtouch or similar gesture. Feedback to the operator may be performedwithout any significant time delay by activation or deactivation of thecorresponding segment 74 a, 74 b.

The segment indicator 72 a may act as bar indicator, for example. Thebar indicator may illustrate a temperature level, for example. Theoperator may select a desired temperature level by touching or“swiping”, and this temperature level is fed back to said operatordirectly by corresponding activation of the segment 74 a of the segmentindicator 72 a. Similarly, the operator may select a desired program,for example, in the case of the segment indicator 72 b by selecting oneof the segments 74 b. This may be illustrated to him directly after hisselection by visual highlighting of the selected or deselected segment74 b.

FIG. 9 shows a further alternative configuration of a control panelcomponent 14 d. The control panel component 14 d may also compriseoperating symbols which are visually and/or haptically perceivable onthe associated cover layer (cf. FIG. 4). These may be printed text 68,for example. The printed text 68 may indicate, by way of example, alinked field 60 b which is located in the region of a pictogram which isconfigured as an illuminated symbol 72, by way of example. The printedtext 68 and the illuminated symbol 70 may jointly instruct the userduring his input. It goes without saying that a selected (operating)field 60 may in principle also be linked to a passive operating symbol,for example passive printed text or the like, without an (active)indicator element being assigned to the (operating) field 60.Corresponding printed text may include, for example, a symbol and anidentification of the region in which the user may make his inputs ormay perform his selection.

In addition, the control panel component 14 d comprises a segmentindicator 76, which is configured in particular as a seven-segmentindicator. The segment indicator 76 comprises a plurality of segments78. A corresponding field 60 a for operator inputs is associated withthe seven-segment indicator 76. It is conceivable for the operator to beable to perform inputs directly at the indicator 76 in the field 60 a,for example by selectively activating or deactivating one of thesegments 78. In addition, it is conceivable for the segment indicator 76to be used for feedback to the operator when said operator is performinginputs over the pictogram 70 in the field 60 b, for example.

FIG. 10 illustrates a further configuration of a control panel component14 e, which may comprise various indicator elements and operatingsymbols for operator guidance. For example, an operating symbol in theform of printed text 68, representing a clock, is provided. In this way,it is communicated to the operator that a time period or clock time maybe set at the control panel component 14 e. This may take place, forexample, in a field 60 b which is defined in the sensor layer 22. Thefield 60 b may be assigned to a seven-segment indicator 76, by way ofexample. In addition, the field 60 b may cover a pictogram or anilluminated symbol 70 b, at which the operator may perform his inputs.Feedback may be performed directly via the seven-segment indicator 76.

The control panel component 14 e also comprises a field 60 a, which isarranged above a pictogram 70 a. The pictogram 70 a may indicate to theoperator, for example, that he may perform inputs in the field 60 a inorder to perform scaling or matching of the input sensitivity in thefield 60 b. In other words, the operator may reduce or increase thesensitivity to time inputs in the field 60 a by means of a “zoomgesture”, for example. In this way, firstly it is possible to runthrough the potential value range quickly. Secondly, it is possible toperform a high-accuracy input where it is desired. It would in principlealso be conceivable to arrange an input field 60 c directly above thesymbol which is illustrated by the printed text and/or surfaceprocessing 68. In this way, a user may effect a corresponding input, forexample by gestures which he performs directly on the symbol (in thiscase on the representation of a clock, for example).

It goes without saying that the active objects 70, 72 and 76 which areillustrated using FIGS. 7 to 10 may be arranged as indicator elements inthe indicator layer 24. These elements may be activated selectively andin this way perceived visually by the operator through the sensor layer22 and the cover layer 20.

Furthermore, it goes without saying that the aspects and configurationsillustrated using the exemplary configurations shown in FIGS. 7 to 10may be combined with one another as desired in order to be able toprovide a large number of different input possibilities to the operatorin a simple manner with little production complexity. This takes placein principle with a high degree of versatility in terms of variants. Asignificant advantage consists in the free scalability and assignabilityof the selected (operating) fields 60 in the region which is madeavailable by the sensor layer 22, in principle.

FIG. 11 illustrates, in simplified form, an exemplary embodiment of amethod for operator guidance, for example for operator inputs in thecase of a home appliance. This may take place advantageously using acontrol panel component 14 and an operating front plate 12 providedtherewith, which are configured in accordance with various aspects ofthe aspects mentioned and described above. In a step S10, a controlpanel component is provided which comprises a sensor layer hidden by acover layer, which sensor layer is designed to detect operator inputsand in particular operator gestures.

In a further subsequent step, a present input mode is defined. The stepS12 may in particular include a (sub)step S14, in which a field whichcomprises a section or a subset of the sensor layer, for example, isdefined and allocated for evaluation. In addition, this may be linkedwith a (sub)step S16, which comprises the activation of at least onediscrete indicator element in order to visually illustrate the presentlyactivated field to the user for his inputs. Alternatively or inaddition, in step S12, a (sub)step S18 may be provided which comprisesthe assignment of a selected (operating) field to an operating symbol,which is provided on the cover layer of the control panel component. Theoperating symbol may be, for example, a printed operating symbol or thelike. A field which is in principle freely selectable in the region ofthe sensor layer may be assigned to the operating symbol (on a softwareor circuitry basis).

In addition, the step S12 may comprise an optional (sub)step S20, whichcomprises outputting feedback to the operator. For this purpose, atleast one discrete indicator element may be actuated or activated. Inthis way, an input made by the operator may be made directly visuallyidentifiable to the operator. In an exemplary embodiment the at leastone indicator element is arranged in the region of the presentlyallocated field for operator inputs. Thus, the operator is given theimpression of performing his inputs “directly” at the indicator element.Step S12 may be followed by a step S22, which comprises the detectionand evaluation of the operator inputs in the presently defined field tobe evaluated.

FIG. 12 illustrates, in simplified form, an exemplary embodiment of amethod for producing or manufacturing a control panel component, inparticular for an operating front plate of a home appliance. The methodmay comprise steps S30, S32 and S34. The step S30 comprises theprovision of a cover layer, in particular a cover layer consisting of aplastic material. The step S32 comprises the provision of a sectionallyactivatable sensor layer, in particular an areally extending sensorlayer which is designed to detect operator inputs, in particularoperator gestures. The step S34 comprises the provision of an indicatorlayer, which comprises at least one discrete indicator element, which isselectively activatable.

Steps S30, S32 and S34 may be followed by a step S36, which comprisesjoining the cover layer, the sensor layer and the indicator layer. Inthis case, the sensor layer may be arranged on a side of the cover layerwhich is remote from the operator (during normal operation). Theindicator layer with the at least one discrete indicator element may bearranged on that side of the sensor layer which is remote from theoperator.

This may be followed by a step S38, which comprises allocation of atleast one defined field on the sensor layer depending on a desired inputmode. For example, fields on the sensor layer 22 may be selected anddefined which are assigned to at least one discrete indicator element.In addition, however, fields which are assigned to operating symbols orsimilar optically and/or haptically perceivable symbols which areprovided in the cover layer may also be selected. The step S38 may beperformed particularly flexibly in order to implement a large number ofvariants on the basis of a given sensor layer.

The step S38 may comprise a step S40, which comprises the provision ofan interface for actuation of the sensor layer and, if required, foractuation of the at least one discrete indicator element. In addition,the step S38 may comprise the provision and installation of a controldevice as is illustrated by a step S42. A control device may be linked,via the interface, to the composite structure comprising the coverlayer, the sensor layer and, if provided, the indicator layer. In stepS38, access may be made to a database, cf. the reference symbol S44. Aplurality of potentially possible configurations including respectiveinput modes may be stored in the database. In step S38, flexibleallocation and configuration of a system which comprises the controlpanel component and the control device linked therewith via theinterface or the associated control device may be performed using thedatabase. A configuration of the control device may be performed on asoftware and/or hardware basis.

Overall, the sensor layer which is provided in a flat manner at thecover layer enables a free and flexible configuration for a large numberof different operator inputs. The sensor layer, if provided, may be usedfor user guidance and for interaction with the user/operator. It is alsopossible for discrete indicator elements with a comparatively simpleconfiguration or operating symbols provided on the cover layer toprovide the operator with the possibility of performing complex operatorinputs. This may take place in particular without complex pixel-basedindicator elements, with the result that the manufacture may involve areduced amount of complexity.

With reference to FIGS. 13 to 18, a further exemplary embodiment of acontrol panel 112 for a home appliance will be elucidated and described.

The control panel 112 comprises a rotary knob 114. In certainembodiments, the rotary knob 114 is the main/major control element forthe appliance. As can be seen in FIG. 13 and FIG. 14, the control panel112 may comprise further user interfaces 116 (input and/out outputinterfaces) which may generally be referred to as control panelcomponents herein.

The control panel 112 comprises a cover 118 which may be referred to asfront cover. In certain embodiments, the cover 118 is arranged as aninjection-molded plastic part. In addition to the rotary knob 114,further controls 120 may be provided, for instance an on/off button. Ascan be best seen in the enlarged view of FIG. 14, there may be symbols124 (or, more generally, a labeling) and indicators 126 formed in theuser interface 116. Generally, the user interface 116 may be arranged inaccordance with the control panel components described hereinbefore. Theindicators 126 may be illuminated to indicate whether or not arespective option/feature has been selected or not. Further, theindicators 126 may indicate a certain operating state of the appliance.It is to be noted that in certain embodiments, the indicators 126 andthe symbols/labeling may be integrally formed (i.e. symbols that can beilluminated or otherwise highlighted).

The rotary knob 114 comprises a rotatable ring 130 and a frontal plate132. In certain embodiments, the frontal plate 132 is fixed (i.e.non-rotatable). Hence, in accordance with these embodiments, therotatable ring 130 may be rotated with respect to the frontal plate 132.In FIG. 13, there is indicated a rotation axis 134 for the rotatablering 130. A curved double-arrow designated by 136 indicates the rotationof the rotatable ring 130 with respect to the frontal plate 132.

Several indicator elements 142, 144, 146 may be provided at the frontalplate 132 of the rotary knob 114. The indicator elements 142, 144, 146may be combined with symbols, a labeling, etc. In certain embodiments,the rotary knob 114 is arranged for detecting touch inputs at thefrontal plate 132. Hence, a certain function, range and/or valueassociated with the indicator elements 142, 144, 146 may be selected(activated/deactivated/altered) by simply touching or tapping on therespective field at the frontal plate 132. The touch feature of therotary knob 114 at the frontal plate 132 may be provided in accordancewith at least some aspects of the disclosure as discussed hereinbefore.

In the exemplary embodiment illustrated in FIG. 14, the indicatorelement 142 is associated with a STOP feature. Hence, by touching therespective symbol, the indicator element 142 may beactivated/deactivated, and the associated function may be activated. TheSTOP symbol may be illuminated or de-illuminated in response to a touchevent. Further, the indicator element 144 designates symbols which maybe as well selected/deselected (and illuminated or de-illuminated, ifnecessary) by touching the respective portion of the frontal plate 132.In addition, the indicator element 146 is arranged in the exemplaryembodiment of FIG. 14 as a seven-segment-indicator. By way of example,the indicator element 146 can be used to display numerical values,ranges, etc. Selecting/altering the values involves a respectiverotation of the rotatable ring 130, in certain embodiments. Hence, byrotating the rotatable ring 130, values and ranges, for instancetemperature values, durations, starting times, etc. may be easily andaccurately defined. A prompt user feedback is provided via the indicatorelement 146.

Further reference is made to the exploded view of FIG. 15, and to theviews of FIGS. 16 to 18. As can be seen in FIG. 15, the rotary knob 114comprises several components that are attached to or mounted at thecover 118. The frontal plate 132 of the rotary knob 114 forms a covercap 150. A support collar 152 extends from the cover 118. In thealternative, the support collar 152 may be arranged as a separate partthat is bonded or otherwise attached to the cover 118. The supportcollar 152 in the exemplary embodiment is cylindrical.

Looking features 154, 156 are provided at both the support collar 152and the frontal plate 132. Hence, the frontal plate 132 may be attachedto and locked at the support collar 152. In this way, a rotation bearingfor the rotatable ring 130 is formed. The rotatable ring 130 is arrangedbetween a peripheral edge 160 of the frontal plate 132 and the cover 118of the control panel 112. The rotatable ring 130 is mounted to thesupport collar 152. In this way, the rotatable ring 130 is rotatablewith respect to the cover 118 and with respect to the frontal plate 132.

The rotary knob 114 further comprises a decorating layer 170, which maybe also referred to as label. The decorating layer 170 may be formed byprinting or coating, for instance. The decorating layer 170 may definethe visual appearance of the symbols/labeling at the indicator elements142, 144, 146 which are highlighted when they are illuminated. Needlessto say, in certain embodiments, the decorating layer 170 may be arrangedin such a way that indicator elements 142, 144, 146 are always visibleat the frontal plate 132 also in a non-illuminated state (e.g. byprinting at the front surface of the cover cap 150).

There is further provided a sensor layer 174. In the exemplaryembodiment as illustrated in FIG. 15, the sensor layer 174 includes asensor network 176. By way of example, respective conductive grids maybe formed on a foil material (substrate) 178. In certain embodiments,the sensor layer 174 is arranged for capacitance-based touch detection.As indicated further above, in certain embodiments, the sensor layer 174is obtained through high pressure forming (HPF). Hence, the sensor layer174 may be brought into a three-dimensional shape.

So as to be operable also in the region of the frontal plate 132 of therotary knob 114, the sensor layer 174 involves an embossed portion 180.Hence, in certain embodiments, an originally flat (planar) foil may bedeformed to match the actual geometry of the control panel 112 and therotary knob 114.

In the embossed portion 180, detector fields 182, 184 are formed. Thedetector field 182 is arranged at a frontal end an associated with thefrontal plate 132. Hence, touch inputs, touch gestures, etc. at thefrontal plate 132 may be detected via the detector field 182 at theembossed portion 180 of the sensor layer 174. At a circumferentialportion surrounding the embossed portion 180, the detector field 184 isformed. By way of example, the detector field 184 may have a circular orcylindrical form, or may be at least a section of a circle or cylinder.

Hence, via the detector field 184, the current angular position and/orrotation movement of the rotatable ring 130 may be detected and tracked.In other words, the detector field 184 may also be referred to as rotaryinput detector field. In certain embodiments, the detector field 184forms a ribbon sensor that is operable to detect a one-dimensional(rotation) movement/position.

In certain embodiments, the sensor layer 174 is operable to detect viathe detector field 184 the angular position/movement of the rotatablering 130 by detecting the fingers of a user that is rotating therotatable ring 130 of the rotary knob 114 by means of capacitivesensing. Hence, the position of the rotatable ring 130 can beimmediately detected. In alternative embodiments, a distinct positionindicator element 186 is provided at the rotatable ring 130. Theposition of the indicator element 186 can be detected via the detectorfield 184. Hence, the position of the rotatable ring 130 can be directlydetected.

As already discussed hereinbefore, the sensor layer 174 may comprisefurther detector fields in addition to the detector fields 182, 184,which may be associated, for instance, with a rear side of the cover 118of the control panel 112 in the region where the user interface 116(refer also to FIG. 13 and FIG. 14) is formed.

There is further provided a light guide 190 which comprises lightchannels 192. The light guide 190 guides light for illumination andindicating purposes to the symbols, labels and/or segments that areprovided at the frontal plate 132 of the rotary knob 114. In certainembodiments, the light guide 190 also guides light to the user interface116 at the cover 118. The light guide 190 is arranged between a supportsubstrate 198 and the sensor layer 174.

At the support substrate 198, several components 200, 202 are provided.This may involve illuminating elements, for instance LEDs 200. Further,circuitry 202 and further processing/control elements may be provided.The illuminating elements 200 may be activated/deactivated in responseto a user input at the rotary knob 114. Via the light guide 190, lightis guided to the frontal plate 132 of the rotary knob 114 and/or theuser interface 116 at the cover 118. It is thus possible to providevisual user guidance and/or user feedback.

Further, in certain embodiments, the sensor layer 174 is bonded to asupport body through in-mold labeling (IML). This may also includebonding the decorating layer 170. In alternative embodiments,particularly when the sensor layer 174 is basically flat, the sensorlayer 174 may be bonded to a support body by laminating, for instance.This may also include bonding the decorating layer 170. In certainembodiments, the light guide 190 forms the support body to which thesensor layer 174 is bonded trough IML. In alternative embodiments, thecover 118 (including the support collar 152) and/or the frontal plate132 form the support body to which the sensor layer 174 is bonded troughIML.

FIG. 16 is a frontal view of the control panel. Line XVII-XVII in FIG.16 indicates the position and orientation of a cross-sectional view thatis shown in FIG. 17, and in FIG. 18 in an exploded mode. It can be seenin FIG. 17 that the frontal plate 132 is attached to and locked with thesupport collar 152 via the locking features 154, 156 (e.g. locking hooksand engagement recesses).

The rotatable ring 130 is retained between the peripheral edge 160 andthe cover 118 and rotatably mounted on the support collar 152. Thesupport collar 152 extends from the cover 118. The sensor layer 174 withthe detector fields 182, 184 is snuggly/closely fitted to the frontalplate 132 and the support collar 152.

The light guide 190 extends between the support substrate 198 and thesensor layer 174 and/or the frontal plate 132. Hence, light emitted byLEDs or similar components 200 at the support substrate 198 is guided tothe front of the rotary knob 114.

In FIG. 18 there is indicated by 206 an indexing mechanism for therotatable ring 130. By way of example, the indexing mechanism 206includes teeth 208, 210 or similar indexing elements at the rotatablering 130 and a counterpart. For instance, indexing teeth 208 are formedat an annular face of the rotatable ring 130 or at a circumferentialsurface thereof. For instance, indexing teeth 210 may be formed at oneof the support collar 152 and/or the cover 118. Via the indexingmechanism 206, haptic feedback may be provided when the rotatable ring118. In certain embodiments, the indexing mechanism 130 includes anindexing spring which cooperates with respective teeth.

What is claimed is:
 1. A rotary knob for a control panel of a homeappliance, comprising: a support collar, a fixed frontal plate forming acover cap that is arranged at a front end of the support collar, a fixedsensor layer that is operable to detect touch inputs at the frontalplate, discrete indicator elements forming an indicator layer, which areoperable to provide operator guidance, a rotatable ring that isrotatably mounted to the support collar, the rotatable ring beingrotatable with respect to the fixed frontal plate, and circuitryarranged to detect rotary inputs via the rotatable ring, and touchinputs via the frontal plate.
 2. The rotary knob as claimed in claim 1,wherein the sensor layer is a flexibly configurable sensor layer havinga sensor network that defines an area which is available for operatorinputs, wherein the sensor layer is sectionally activatable depending ona desired input mode so as to define at least one field corresponding toa sectionally activatable area to be monitored for operator inputs onthe sensor layer depending on the desired input mode, and wherein the atleast one defined field is a subset of the available area formed by thesensor network.
 3. The rotary knob as claimed in claim 1, wherein thesensor layer also extends beneath the support collar and forms there arotary input detector field that is responsive to rotary movements ofthe rotatable ring.
 4. The rotary knob as claimed in claim 3, whereinthe rotary input detector field is arranged to detect movements of anoperator's fingers as the rotatable ring is rotated.
 5. The rotary knobas claimed in claim 3, wherein the rotary input detector field isarranged to detect movements of the rotatable ring, and wherein therotatable ring comprises a position indicator element the position ofwhich is detected by the rotary input detector field.
 6. The rotary knobas claimed in claim 3, wherein the rotary input detector field forms aribbon sensor that is operable to detect angular movements.
 7. Therotary knob as claimed in claim 1, wherein the rotatable ring isrotatably retained between a peripheral edge of the frontal plate and acover of the control panel from which the support collar extends.
 8. Therotary knob as claimed in claim 1, wherein the sensor layer is acapacitive sensor layer having a capacitive sensor network.
 9. Therotary knob as claimed in claim 1, wherein the sensor layer has athree-dimensional shape manufactured through one of thermoforming andhigh pressure forming, based on a planar shape, and wherein the sensorlayer is bonded with a support body through in-mold labeling.
 10. Therotary knob as claimed in claim 1, wherein the sensor layer is abasically planar sensor foil, and wherein the sensor layer is bondedwith a support body through laminating.
 11. The rotary knob as claimedin claim 1, further comprising an indexing mechanism for the rotatablering.
 12. The rotary knob as claimed in claim 1, wherein at least one ofthe discrete indicator elements is arranged to illuminate a selectivelyactivatable symbol or a discrete selectively activatable segmentindicator.
 13. The rotary knob as claimed in claim 12, wherein aseven-segment indicator is formed at the frontal plate that is operableby selectively activating the discrete indicator elements.
 14. Therotary knob as claimed in claim 1, wherein the cover cap and the sensorlayer are at least sectionally transparent or translucent.
 15. Therotary knob as claimed in claim 1, wherein the sensor layer overlaps atleast some indicator elements of the discrete indicator elements, andwherein the circuitry is arranged to detect touch inputs in the vicinityof said indicator elements.
 16. The rotary knob as claimed in claim 1,wherein the sensor layer is arranged between the cover cap and theindicator layer, wherein the indicator elements are arranged at asupport substrate, and wherein a light guide is arranged between thesupport substrate and the sensor layer.
 17. The rotary knob as claimedin claim 16, wherein the support substrate is arranged at a rear side ofa cover of the control panel, and wherein the light guide extends fromthe support substrate into the support collar to the frontal plate. 18.A control panel for a home appliance comprising a rotary knob as claimedin claim
 1. 19. The control panel as claimed in claim 18, wherein therotary knob is formed at a frontal cover of the control panel, whereinfurther discrete indicator elements are arranged at the frontal cover inthe vicinity of the rotary knob, and wherein the circuitry is arrangedto operate indicator elements at the control panel in response to userinputs detected at the rotary knob.
 20. A home appliance comprising acontrol panel as claimed in claim 18.